Which informal fallacy is committed in the following statement: How can you say animals have rights and should not be killed, when you eat meat?

The reply targets the speaker's own conduct instead of the argument about animal rights.

The claim that animals have rights and should not be killed must be judged on its reasons.

Pointing out that the arguer eats meat charges them with inconsistency.

Personal inconsistency does not show the claim about animal rights to be false.

Attacking the person in this you-too manner rather than the case is the ad hominem fallacy.