Yes if eaten, if worried ask your vet what he thinks.

Though in general animals do not eat plants... you will probably find there are other poisonous plants in the garden too.

the seeds are the most poisonous part of the tree - if you're concerned, clip off the flowers as they fade to prevent seed formation and drop. On the other hand, if they're Laburnum watereri 'Vossii' they produce hardly any seeds at all anyway. Otherwise, as long as your dog doesn't climb a ladder and eat the foliage, it'll be fine, lol!

Sorry to disagree, Bamboo, but the whole tree is poisonous. The seeds get the blame because they are the bit that tends to get eaten by children who think the seedpods look like peapods.

That said, it is not nearly as bad as many people assume and cases of serious illness are few and far between.

As far as pets are concerned, I did hear of one case where a kitten used it as a scratching post and then ingested particles from its claws when it cleaned itself. Sadly, the kitten died.

As Moon-grower noted, there will be plenty of things in any garden that are toxic to dogs. Mostly, however, dogs ignore them.

I know the whole tree is poisonous, all parts, but still believed the seeds were the most toxic of all - is that not true?

I thought that was the case too Bamboo.

Sorry, Bamboo, I misunderstood your comment. Many people say that it is only the seeds that are poisonous.

It's true that the seeds have about ten times the cytisine by weight compare to the leaves. But, of course, there's a big difference between the weight of one seed and one leaf.

If you ate the leaves, you might get as ill as you would from eating seeds. The difference is you wouldn't be likely to eat the leaves.

I don't have any figures for the concentration in the wood but I have heard of woodworkers feeling a bit off colour after turning laburnum.