As others have noted, find ECs that interest you. There are a large number of paths that lead to admission to vet school. So its not like experience A or B will lead to vet school but experience C or D will not. It will be easier to write vet school essays about experiences you like and talking about activities you like in interviews (for vet schools that interview) will be better received. Plus its a lot more fun/interesting to do things you enjoy rather than things you think you should be doing.
And keep an open mind. You never know what experiences will interest you. Or ones that you thought you would enjoy are not that enjoyable once you experience them. Nothing wrong with that.
My daugther will start vet school this fall. One thing we heard from pretty much everyone was “undergrad a cheap as possible.” Debt at graduation is a significant issue (one that schools spend a lot of time discussing). If there is $400-$500k available to pay for undergrad/vet school, not an issue. But for everyone else, its an issue. My daughter took a full ride for undergrad that was refundable. So for 2 semesters when she had a job (graduating in 6 semesters of classes), school still paid her room/board and deposited tuition scholarship in her bank account. Allowed her to bank essentially a full year of vet school tuition.