There are two sentences, not one. They are grammatically OK.
When you say "how to treat animals", the word "treat" has multiple meanings. Do you mean how to take care of healthy ones (feeding, grooming, loving etc.), or curing sick or injured ones?
Can you check this sentence, please?
I know a little about helping injured and sick animals from volunteering at the social shelter. I look forward to learning more in school about how to treat animals.
2 answers
I mean curing or injured animals.