Its basically a canister of air, it comes out as a loud spray noise and stops/interrupts the animal during unwanted behaviour. You dont spray it directly at the animal though. I have found it very useful for when my dog jumps up at people. Just to see the can in my hand is now the deterrent for her. Use it along with a command, i.e 'down' and they learn pretty quick. Its also good for 'leave/drop it' commands. My dog behaviourist also recommended it. =:o)
I suppose it could but I used Grannicks Bitter Apple spray which states "The powerful taste deterrent invented by a pharmacist in 1960 discourages fur biting, hair chewing and hot spots". The pet corrector is good for stopping our Jack Russell terrier from jumping on the furniture. I hope this helps. Good luck.