Effects - Is marijuana toxic to house cats?

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Swim has a cat mabey a year old... when swim is smoking weed the cat will jump on his lap and sniff at the smoke when he breathes it out.
This cat is a little pothead... if swim puts a little piece of green in front of his face he tries to eat it (though swim has never fed the cat weed) its like the cat likes to smoke weed. This is not one of those cases were someone puts a cat in a box and blow a ton of smoke into it. Thats kinda mean. This cat will scratch at the door when swim is smoking and when swim opens the door he jumps strait on his lap when swim sits down and purs. Then when swim is blowing smoke out the cat tries putting his noes into it and does this little sniffing thing with his noes.... the cat likes weed. And swim does sometime blow the smoke into his face but the cat likes it and sniffs at it. Swim has tested this. Swim will blow the smoke away from the cat and the cat tries to get his little noes all up in it. Swim wants to know if this could harm her pet? Swim knows alot of people would consider this animal abuse. But the cat does it on its own free will. The cat likes to smell the smoke. (that point has been stressed enough).
So is the cannibus smoke toxic to swims cat?

The only info swim could find on google was very anti drug and swim almost thinks its just scare tactics. And swim would get flaimed in any other forum But swim wants to know for sure so swim is asking here. At least swimmers are open minded biengs =)