If its not impacted those baby tooth is loose I would think it would easily come out. One of my kids had a retained baby tooth that was not coming out and an adult tooth that was coming in. I told them if didn't not come out they were sure to need braces and would need to be pulled out by the dentist to avoid that. My son pulled out his retained baby tooth by himself - it was loose already and came out easy. He hates the dentist. A healthy treat is a frozen apple without seeds and core removed stuffed with peanut butter (the peanut butter without the fake sugar- xylitol- which is poisonous to dogs.) this may safely loosen that tooth.