First off, don't make the dogs "belong to the kids." Huge, huge mistake. The dogs should be the Family Pets. Ownership of the dogs belongs to you and your husband, not the children, and the dogs are members of the family. Your kids are going to be pack-mates to the dogs, not authority figures. You can't expect the kids to maintain dominance or authority and for the dogs to "listen" if the kids are still small and the dogs view them as playmates and siblings.
Decisions about the dogs are made between you and your husband, so if you allow the kids to believe the dogs "belong" to them it's asking for trouble in the future. Especially if you have problems with the dogs and have to surrender one or both of them.
Resign yourself to the fact that you will be responsible for the majority of the care. While a dog is a puppy it's just as much work as a baby. They need training, they have fears, they need a ton of attention, they stay up most of the night... they're just more mobile than human babies. I would make the kids responsible for food and water, since you have to feed more than once a day. Make the kids responsible for cleaning up dog poop in the yard and disposing of it. Take the kids on walks with you and the dogs and have the kids bring the poop scoop and a bag to dispose of the poop on walks. Have them keep track of and put away dog toys. They can help with bathing.
The big, important stuff and the chemical stuff should be your responsibility.