Good thread. Welcome to the forum! Please pass to the introductions section to say hello to members and tell us more about yourself and your collie. Feel free to post a picture of her, too, if you so wish!
I agree about dogs liking fruit, and in reasonable quantities can give minerals and vitamins. Two of my dogs in the past loved bananas, but I didn't give too much. One has to be careful of the sugar content.
Regarding fruit and vegetables for dogs, here is a list of items which shouldn't be given to dogs, which my esteemed colleague Tobi posted on another animal forum:
* (Any products containing XYLITOL)
* Caffeine, or anything containing Caffeine....coffee, tea, chocolate (already mentioned) Coca Cola, energy drinks etc.
* Bread dough (it rises in the dog's stomach causing pain and bloating -no fun!)
* Apple seeds and pits from any fruits (contain cyanide!)
* Macadamia nuts.
* Bones are generally bad news. They splinter and cause lacerations or blockages in the gut. At the very least they cause dreadful constipation.
* Onions (cause a dangerous form of anaemia)
* Garlic is borderline, some dogs can tolerate it but it might be better not to risk it.
* Fatty food (causes acute Pancreatitis) Sometimes even a small amount of greasy chicken or turkey skin can cause a dog to have a Pancreatitis attack.
* Dairy. Dogs are basically lactose-intolerant, and dairy products can cause bad stomach/gut upsets. Some can tolerate small amounts (like cheese treats) better than others, but best to keep dogs away from drinking milk.
* Mouldy food. NEVER give a dog anything which is suspect, spoiled or mouldy.
* Tobacco and Nicotine gum.
* Marijuana (even inhaling the smoke can be dangerous, but more dangerous if ingested. Causes seizures and death).
However, a few items in the list above can be tolerated by some dogs. For example, Puce used to love cornflakes and milk in the evening. But it always best to err on the side of caution.