Dear Xiaoqiu, I could not find any antibody to FGFR2 in my usual antibody comparison sources. There are a few publications with RT-PCR for ovine FGFR2, but to my knowledge, no IHC. Have you tried to ask directly large antibody suppliers? You could ask Serotec for help - they have antibodies for veterinary research and in the past, when I was looking for rare antibodies, they had been very helpful. Thermo-Fisher has 11 antibodies to FGFR2 ( anti-human, -rat, -rabbit, -non-human primates) - you might ask if they are extending their range further. Good luck with your project.
Thank you very much for your advice. Fortunately, I found one FGFR2 antibody from Lifespan Biosciences that works for sheep. I tested it by WB. Plus, according to their suggestion, this antibody works for Cow, Sheep, Pig, Dog, etc. Again, thank you!