Apple seeds, persimmon, peach, and plum pits, as well as other fruit seeds or pits have "cyanogenic glycosides". For example, if an apple seed skin is broken as a dog eats an apple, then cyanide could be released.
Apple seeds contain a cyonogenic chemical that when it reaches your stomach, it reacts with the enzymes and releases hydrogen cyanide, which is very toxic. (This is the same for cherry pits, I think). Are grapes healthy to puppies?
Although apple seeds may seem harmless, they pose certain risks to dogs due to their cyanide content. Cyanide is a potent toxin that can have detrimental effects on a dogs health when ingested in large amounts. Here are some potential risks associated with dogs eating apple seeds
Apple seeds (and the seeds of related plants, such as pears and cherries) contain amygdalin, a cyanogenic glycoside composed of cyanide and sugar. When metabolized in the digestive system, this chemical degrades into highly poisonous hydrogen cyanide (HCN).
Comparing Apple Seed Toxicity to Other Fruits and Foods. Apple seeds are not the only fruit seeds that contain amygdalin. Other fruit seeds, such as cherry, peach, and apricot pits, also contain this toxic compound.

Moving forward, it's essential to keep these visual contexts in mind when discussing May Apple Seeds Toxic To Puppies.
TOXIC to puppies - Lily of the Valley. 2. Hazardous Plants: I have a fairly comprehensive list however you should always double check the plants you have too. Apple (including crabapples; stem, leaves and seeds contain cyanide, but the fruit is okay for dogs).