Hillside H Ranch has given you very, very sage advice.
Think logically about the decisions you make for your mare - and they ARE your decisions, not your vet's.
Fact: Every time you stick something in a mare's uterus, you cause an inflammatory response.
Fact: The semen you put in there today will not be any less viable tomorrow than the second dose which has been sitting in a box in the fridge for 24 hours.
There is no good reason to stuff more semen in there. The swimmers that are already in there will do the job. The *only* instance in which more is better is if, as previously mentioned, the motility numbers aren't great.
Now, go forth and do your mare and your pocketbook a favor - throw away the second dose.
I have heard (from stallion owners) of mares bred FIVE DAYS before ovulation and they still caught. You have to trust that the little guys will get the job done!!
I understand what you guys are saying. I can understand the innflammatory response. I did talk to her and she seems to think that putting the second dose in tomorrow will be a good idea. She has been breeding horses for a long time and I will just have to take her word for it. She also wants to see if the follicle size has changed at all.
I am keeping my fingers crossed. She may be one of those mares that doesn't ovulate until the follicle is over 40 mm.
I am just glad I didn't counter to counter it on Monday!!