Stop the raisins immediatly. They have a laxative effect if given too often. Instead. Remove pellets for a couple of days and feed only hay. Do not use alfalfa while chinchilla has still go diarrhea. If chinchilla doesnt ever eat much hay then you will of course have to leave pellets in but do try adding much less than usual to encourage him to forage and eat the hay.
If really watery droppings has been going on for a few days then please do consult your vet as your chinchilla may have picked up a bacterial infection and in worse case senario it could be the parasite named Giardia. If Giardia is suspected you must act quicky as it is fatal often if not treated quickly.
If you suspect it's just too many treats and no infection:- Again try feeding more hay, less pellets until dropping are back to normal.
A quick rememdy is Put your toaster on and practically incinerate a piece of toast. Has to be really black/burned to work. Bearing in mind the size of your chinnies tummy a piece the size of a man's thumbnail is usually enought to get the droppings back to normal. Cut back on pellets and give a higher proportion of good quality tymothy Hay. Loose or small droppings are a sign that feeding is not right and this has to be addressed by you to rule out the offending treat.
Once diarrhoea has stopped and regards treats, only give one raisin and not every day. Kat a member of our group mentioned a good tip a while ago about raisins cut them up into little pieces, the chinchilla then thinks it's getting a lot of treats. ;) A small piece of apple, and I do mean very small is a treat also. Or a piece of rye crispbread such as Ryvita. This is better than a raisin as there is no salt or sugar added to Ryvita. These treat of corse should not all be offered each day! one of them only is enough.
Remember the size of your chinchilla's stomach when feeding treats.
Check out the wild chinchilla protection site to see how barren it is
Question [2] I'm confused a little bit and need some advice. Our new little girl's dropping our much softer then my males. I know the droppings are not normal, they aren't too running but are a bit too soft. Could she have been given something that she shouldn't have? Should I just keep her on only pellets for a while? Anyone have any suggests for me please. Haven't had to deal with this one. Otherwise it looks like the two of them are going to be good together._ Cherie
Treatment as suggested by Aileen
The breeder you bought her from will I hope have given you a supply of pellets and also a good supply of hay that they have been using. Also the name of treat if any they use. Make the change over gradually. slowly increasing your own brand of pellets and hay mixed in with the breeders supply. Sudden change in diet is often the root cause of change in droppings as is sometimes infection. If in doubt make an appointment to see your vet and take a fresh urine and droppings sample in case he wants to do tests.