I was thinking the same thing!
Also, have you talked to students from the school that isn't 'ideal'? interview settings can be very artificial and affected by a lot of external factors. As for not having the area you want to study, what gave you that impression? Not everyone will be well informed about what is/isn't a strength of the school. For example, most weeks my professors cant even remember that I have a zoo class every Thursday (for years this class, which is basically a requirement for zoo med has existed at the same time and place) and keep scheduling instructor lead review sessions during it, then looking surprised when any of the zoo folks say could we look for better days to do this? Zoo is suppose to be one of our strong points and yet there are staff members who dont even really know it exists (not just the class, but the focus area.)
I would do a whole lot of investigation BEFORE I rejected a school. And I am pursuing zoo med, so I understand that extra dynamic. I can honestly say, even if the school only did SA and LA, if it was the only acceptance I got, I would be on the doorstep for orientation. Why? Because I will need an internship and residency anyways, and there are plenty of opportunities to obtain more exposure through externships, summer programs, doing research through summer programs at schools that are more zoo focused, etc. I think you could probably even contact schools with more zoo focused programs and see if you could audit courses somehow. Ours is broadcast online for off site residents and staff, so it might be possible to get special permission to audit
then you can use that as a selling point of how you went above and beyond to get the exposure and education you needed.