Can you describe what the incision looks like?
And it depends. When we think about infection, we think about pus growth, swelling, and signs of irritation. That being said, movement like flopping, jumping, and running may be a bit painful and lessen; however, due to medication, the advancement of an infection, and other factors, a rabbit may move freely as well. Wick functions quite normally when his teeth are irritating his mouth, and when he was constantly having sneeze attacks, he would still act normally too.
It’s great to consider activity, but I think for a surgical site, looking at the site can be a sign (and arguably something can look fine, but you’ll see the rabbit’s activity decline; both are important).
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.