Poisonous tree/shrub

[lulu_bucket]

We have recently built a dog kennel and run for our 5 dogs. We have a contoneaster salicifolius tree/shrub over hanging this which does have berries on at times of the year. The tree will provide shade but how poisonous are the berries if the dogs did eat any? We can put some netting up over which will give shade also but dont really want to cut the tree down unless we really have to.
Thanks

[bricro]

Birds like cotoneaster berries but dogs!

[lankeela]

According to this site they are toxic to dogs:

http://burkesbackyard.com.au/article.php?id=60 32