May
If they're healthy dog biscuits, sure.
My rats love Nutro's dog biscuits made out of berries and brown rice. They smell like blueberries before you even open the package.
Just don't give them too much of any treat, and they'll be fine. 
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Dog bones are generally too massive for them. If you break them up, it's fine, or if they're low calorie and have moderate protein.
I give my rats a 100 calorie pack. Strangely, they sell them!
they're small dog treats and one bag out of the pack lasts me a week for all three of them since I don't just throw it all in there.
I also use low-calorie biscuit treats for obese dogs, and a couple pieces of Pedigree dog food.
My baby rat loves the way she can hold the mini bones in her mouth without hitting the wall as she runs.
You can also give them cooked bones and pieces of thoroughly cooked meat. :]
But be sure to exchange treats like this every so often with vegetables and fruit. I'm fond of bananas and peas.
Also, be sure not to make these their staple diet, as I'm sure you know. Too much protein and calories can hurt their body.
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Yes they’re hard thus good for their teeth. Dont give too much just as a treat now and again. Sometimes if you get the dog biscuits that have a hole in them you can attach them inside the cage which gives them something to do when youre not around.
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Yes it is fine to give rats dog biscuits in moderation, but not part of their daily diet. Also try and find a dog biscuit that is low in protein and is actually a good brand!
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Yep, in fact they have the ability to have nearly anything you can, but they shouldn't have meat. They’re scavengers, they'll eat whatever they have the ability to get their tiny paws on.
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yep, i give them to my mice as treats.
since their teeth are always growing, the hard dog biscuits also help to wear down their teeth.
they also give protein to your rats if theyre not getting enough.
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yup they practicaly eat anything… i have koi fish and i have lab rats too and i feed them wd my fish food hahahha they loved it!
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Sure can my rats LOVED dog food and dog biscuts. My vet had no complaints and knew what they got for treats.
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yes! they love it too. it is also full of protein which will make little ratty strong.
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sure,why not?