1 year old. Traditional philosophy pushes waiting until the child is one year old. However, it is very common for parents and healthcare workers who care for premature children and infants with reflux to add rice cereal to formula. If you do begin feeding solid food to an infant, begin with one type such as rice cereal and start with small portions or amounts. Watch for any distress or negative results (colic or constipation, even diaper rash). If such occurs, stop.
Baby mice are introduced to food by their mothers so you should not need to interfere in anyway unless the baby mouse doesn't have a mother. I think baby mice start to eat solid food at around 2-3weeks.
At 4 to 6 weeks they should start to eat solid food and drink water.
proberly not
It iss recommended to start feeding an infant solid foods (baby food) at 6 months. Before then, Their stomachs are week and it make it tough for them to digest the foods.
After 6 months you should start giving your child some solid food like cerelac etc.
Never. He or she could get sick.
Introducing solid foods can increase the risk of gastrointestinal infections and allergies. 6 months is when you should be weaning, see here: healthvisitors.com/hv/5/125
her breeder should have started them on solid food at about 5 weeks and no one should let a puppy go before 8 weeks. You should not be using cows milk Use dry food and Goats milk.
A five week old puupy should not even be eating solid food yet and should not be away from its mother. A puppy should start eating solid foods when it is at least 6 weeks old or older. You should start out with soft food but soon switch to hard food after that because it is better for them.
Baby hamsters will start to eat solid food at around 8 days old until they are gradually weaned at 21 days
A baby mouse can start eating a small amount of solid foods once they open their eyes at about 2.5 weeks of age. They will enjoy soft cooked vegetables such as peas and carrots as well as kitten food mixed with a small amount of water or moistened hamster food. If the mouse is being fed by its mother, it can switch completely to solid foods at about four weeks of age. If you are caring for an abandoned mouse, it should be ready to switch to all solid foods at five or six weeks.
If it is old enough to be weaned (8 to 10 weeks old), then you can just introduce canned or moist food to it and it will usually just start to lick it and start eating on its own. But if it is not trying to, you can put a bit of canned food on its paw and it will lick it off. That may help get it started. Dry food should not be its only food.