Do you have to pay for temporary damages? or is one allowed to damage another if the object damaged will grow back itself? Bava Batra 18b third wide line says that if having your beehive is a danger to your fellow's mustard plant becasue of the concern that the bees will attack the mustard seeds- it's no problem becasue the bees won't find the seeds and if it's a concern of the bees eating the leaves- it's no problem because the leaves will grow back.

This gemara seems to say it's no problem to damage if the plant will grow back itself. however gemara avoda zara 30b says one is allowed to feed water that may have been poisoned by snake venom to your own cat because even though the cat will become temporarily weak it will not die; on the other hand, one may not feed this water to his fellow's cat because it will weaken the cat temporarily and this will cost your fellow money if he decides to sell the cat in its weakened state. this gemara implies that it's strictly forbidden to damage your fellow even if it will grow back. what's the difference in the two gemara's. i hope the question is clear. thank you very much.

Ike Sultan, west orange, NJ