Yes – but in moderation and only as a rare treat. Anything more could be bad for their health because this fruit contains a lot of sugar that isn’t good for them. It could also cause them to have an upset stomach and diarrhea because of the water content.
Normally rabbits do not need a lot of fruits in their regular diet and a better option for them is fresh water, rabbit pellets and timothy hay.
Therefore it is important that you stick to these items as the basis for their diet and then to spice up their diet a bit and change things up you can slowly introduce pears a little bit from time to time to make their food interesting.