I have 2 female pitbulls, my 3rd a male passed away last year of old age. My pit bulls are NOT the short bully boxer types they are your true all american kind, taller leaner and muscular, so it depends on your type, and age too. I think the best answer to that is IT VARIES, so you need to measure. Each of mine is a different size my boy more of the size of a large Labrador so used the largest size a 5, my middle girl an average pit bull size about the size of a dalmation so about a 4, and my smaller youngest one is about a 3 but may lead into a 4. I found taking them with me to try on and size always works the best, but I'm NOT sure what Petco's policy is on this or if you live near one or if your dog's behavior would allow for this to be done. Good LUCK.
answered 2 years, 11 months ago
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