Quote Originally Posted by Jessika
OK I'm sorry to bump this but I have a similar question....... I've already searched this on google and found conflicting information about how they can be toxic and others say they can be harmless. I'm assuming the latter since the first post says their dog loves pistachios and nobody replied saying they are toxic.... but that's the very question I have. Are pistachios safe for dogs?

We've always given Charlie some when HJ eats them and haven't run into any problems... but today I thought I might look it up, and found some "opinions" saying they can be toxic!! So I just want to be sure.

I will see what I can find out for you. I know some nuts are toxic but not sure which ones. I will check our dog encyclopedia

ETA:
Ok I go this from Our 'Complete Dog Encyclopedia'

Quote Originally Posted by The Complete Encyclopedia of Dogs

Macadamia nuts - The toxic compound is unknown but eating as few as six nuts without the shell has been known to cause elevated body temperature, accelerated heartbeat, tremors in the skeletal muscles, and weakness or paralysis of the hindquarters. Affected dogs have difficulty or are unable to rise, are distressed and usually panting.Some affected dogs have had swollen limbs and showed pain when the limb was manipulated. Dogs did recover from the muscle weakness and pain and it is not known if there have been any fatal cases. Macadamia butter is included in this warning.

Nuts - Nuts in general are not good for dogs as their high phosphorus content may lead to bladder stones
And I found several sites that says the same thing.
This is from this website.

Quote Originally Posted by entirelypets.com

Macadamia Nuts:
Macadamia nuts are another concern, along with most other kinds of nuts. Their high phosphorus content is said to possibly lead to bladder stones. Dogs develop a tremor of the skeletal muscles, and weakness or paralysis of the hindquarters. Affected dogs are often unable to rise and are distressed, usually panting. Some affected dogs have swollen limbs and show pain when the limbs are manipulated.


NOTE: Pets owners should not assume that human food is always safe for pets. When it comes to chocolate, onions, garlic and macadamia nuts, such foods should be given in only small quantities, or not at all. Be sure that your pets can’t get into your stash of chocolates, that food scraps are disposed of carefully to prevent onion and garlic toxicity and that your dog is prevented from picking up macadamia nuts if you have a tree in your garden.