They are not considered toxic. We have them along a paddock and I checked this out a few years back. I thought the unripe berries were toxic but they are not.

 

Unripe elderberries are toxic.

 

Scientific link? The ASPCA says "non-toxic" no proviso on ripeness. The information that unripe mulberries cause hallucinations is not true, yet another internet myth.

 

Mulberries are not toxic, but boy oh boy will they give a dog the runs. We used to have a mulberry tree in the backyard, and the dogs would gorge on the fallen berries... cleanup was NOT fun.

 

Elderberries are different than mulberries, aren't they?

And ugh...not looking forward to purple poop!

 

yes, they are different. Elderberries are tiny, round berries.
http://plants.usda.gov/plantguide/pdf/cs_sanic4.pdf

And the scientific proof
Poisonous Plants - Elderberry - The Poison Plant Patch

 

they grow wild. You never know where they'll pop up. We have two bushes out there that we just found last year. I have enough berries for two batches of jam in the freezer.

 

My 4 dogs (two past GSD & two present GSD and Lab) eat a bunch of mulberries and wild raspberries daily when in season and they never got the runs. However, the mulberries in particular leave seeds in the poop so don't get worried and think your dog has some kind of worms The dogs stand with me and eat them right off the tree (Mulberries and right off the vine for raspberries) It's cute too because they have figured out that the ripe berries are the ones that come off easily in their mouth, so they no longer waste time on unripe berries.