While you’re hunting skeletons, kill zombies as well and gather rotten meat. This comes in handy to feed your dog but this isn’t the best food for them; as Rabbit Stew is. Rotten flesh cannot be used in taming, it may be convincing when they are begging but all it will do it breed an untamed wolf. If you’re in Creative mode, just add one to your inventory.
If you don’t mind starting a new world, you can find world seeds online that create worlds with many taiga biomes. Forest also work but as of 1. 13 (Ocean update) there is a couple of seeds to choose from. In Creative mode, you can spawn a wolf anywhere. If you are an Operator you could summon one. The command for this is /summon minecraft:wolf .
Be very careful to click the Tame button and not the wolf. It’s easy to click the wolf accidentally and turn it hostile.
You cannot feed a dog bones. They only work on wild wolves.
You can find dye ingredients in treasure chests. Dyes can be made from plants. White is bonemeal, black is wither roses or ink sacks