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By introducing horses (ponies of any breed) with genetics that are not, you can gradually decrease the percentage of resulting carriers, but it would take quite sometime. For one you do not know which foals from the crosses are non-carriers and which are carriers, only breding and getting a...

Lisa, Something like that is seen in human dwarfs with certain types of dwarfism. ACH has the Magnum Foramen problem in humans, which causes breathing problems in the human dwarfs and can cause death if not surgically corrected. This breathing problem I have seen as a common characteristic in...

I get the feeling you really feel that the dwarfism we have inthe Miniatures is caused solely on hypothyroidism due to environmental causes, like nitrate levels or iodine. I really dont think whatever I say will change that, so all I will do is comment on my opinion of the article you presented...

"My question is... Are there any other organizations who are researching Dwarfism, or who have shown an interest in researching Dwarfism, who might benefit from your research? I fully well, understand why you would want to "protect" your work until it is published. But, it has occurred to me...

Question ~ If you have a stallion or mare that produces a minimal dwarf are they likely to produce the typical dwarf with the bad bite, large head and crooked legs? Where can we find more information on the "types" of dwarf genes? To try to bring some rational understanding to this subject...

I can't answer that, I cannot tell you specific bloodlines, I am in the middle of my work, I would be accusing a line of something with no scientific proof to back it up. I will only say that there is a very good possibility no one is free from the types I have seen. John

Sounds like with the mouth that she developed hooks, it does not sound like anything that is defitinitely genetic only. When was the last time she had her teeth floated or caps pulled?? She is two now she should be shedding her front incisor caps, though I am NOT an equine dentist. Club feet...

"if I breed stallion A to mare B and have offspring smaller than both sire and dam, does that indicate the involvement of a dwarf gene, or is it just random height fluctuation? If you add to the equation the pretty but somewhat domed head and large eyes that we see often in this breed but assume...

kaykay, I looked at the pedigree, and looking at the mare, nothing screams that she is recessive. That is far from saying she is a non-carrier, she has a possibility of being a carrier. Her Grand sire on the dam side never had a dwarf, but that is 2 generations back, a lot of other genes are...

"If you breed a stallion and a mare ..and they produce a dwarf..(so you know they both carriers, right?)" Yes "than you breed the stallion to ANOTHER mare and have a normal foal..what is the precentage possibility that the offspring is a carrier? Thanks " Depends on if the mother to the...

If you breed your stud to 25 or more known carrier mares of one type (not guesses on looks), and no dwarfs of that type are born then your percentages of that stallion not being a carrier is in the mid to upper 90's percentage wise for him not to be carrying the dwarf type that you are looking...

Reble, I had a nice rather long answer and I was kicked off and lost it all, so I will try to answer you again from memory. How do you believe we can protect our breeding program, until the research is complete and hope for an answer? Those are choices you will have to make, I am not in a...

Minimor, Please read my post I just did to the thread Nitrates Again. I go into great length discussing Dr Allen's thesis paper with regards to hypothyroidism and its characterisitcs. That said, your question IS very valid. Yes there is a DEFINITE chance that Miniature horses born or raised...

"Below is a link to an article written that gives a slightly different description of the affected foals with congenital hypothyroidism due to Nitrates. This article describes them with an underbite..and also notes references. Does this sound disproportionate? Thank you for taking your valuable...

R3, Below is the link from Canada making a notation on the theory of hypothyroidism in smaller horses possibly due to nitrate toxicity. Thyroid function, normal or abnormal, influences the growth of all animals, this notation in the Ontario website describes rather poorly and generally a...

"Hi John I was wondering if you believe that certain bloodlines when crossed with other certain bloodlines are more likely to produce a dwarf (parents are all beautiful with no dwarf characteristics). I have noticed that problem with a couple of bloodlines that I will keep private (you are...

"If a specific gene has not been isolated, how do we know for sure that there is one, and that some horses are just carriers? " It is called population genetics, I advise you get a book about it, in there it will expalin about genes and generational large scale inheritance patterns with respect...

I do not know of any problems gelding a dwarf at 2, other than him not having both testicles dropped yet. I would think that if they were both dropped that he would not put him under general anesthesia, just sedate him and cut. I just think he didnt want to do it or was afraid he would kill...

Sandy, It could be several months, it could be literally several years. It all depends on number of samples that can be used in early studies, amount of money raised for research, and how little sleep I can function on, I am the research lab so to speak. John

No, That would be something to look at more for cryptorchidism alone. Even if your colt had both testicles descended. If the measurements of the testicles were outside of expected norms for size, either too large, or too small, you would look at cryptorchidism first, I would. It is well known...