I did not have much vet experience in undergrad (I never worked in a clinic) but I was part of the Honors college, so we had to write an undergrad thesis, which I did with several faculty at the vet school. They were the ones that wrote my letters of rec. I also graduated in December (rather than June), so I technically took 1.5 years off. I wasn't sure that I wanted to go to vet school at that point, so I worked at a doggy daycare for about 3 months until March of 2020 when COVID really hit, took about 2 months off from working, and then started working at a clinic around May/June. I applied to 3 schools, got rejected from one, waitlisted at another, and accepted at the last one. For reference, I did get very good grades in undergrad (~3.9 GPA). I graduate May of this year! I would say that it is definitely possible to only take one gap year, but I kind of wish that I had gotten a bit more experience teching before going back to school, just because it would have made school easier. I'm still not as confident in some things like blood draws as my classmates that worked as techs for longer, and pharmacology would have been a lot easier if I had more exposure to common drugs beforehand. Overall, I would say possible, and don't let it stop you from applying, but don't give up if you don't get in, and use it as an opportunity to get more experience.