Dogs and cats may go through a period of transition when starting a new raw diet, sometimes referred to as 'detoxing'. It's more just a case of adjustment to what is going into their digestive system.... and what is coming out. Some pets may show very little in signs of this process and others may react more obviously - it all depends a lot on their age, general health and the kind of food their body is used to.
There can be a range of reactions, or symptoms, such as waxy build up in the ears, intermittent diarrhoea. vomiting, lethargy, mild fever, bad breath and skin irritations. None of this lasts very long and it is actually a good sign that things are changing. Of course, if your pet shows signs of illness or does not recover quickly from any of these minor symptoms, please consult your vet as it may be a sign of an underlining medical condition.
When your pet has been eating a raw food diet for a period of time there will also be a change to their poo. Their poo will become lighter in colour, often covered with a white chalky powder (which is just the digested ground bone or eggshell, depending on the range). An added benefit from this new diet is pick-up-able poos, which are smaller, harder and happily smell-free.
Usually this process is over in a matter of days, or the most a couple of weeks.