You have allot going on there ... even more than you may realize. Lots of questions to answer ... each answer will help:
1) How old are Sorley & Xochitl?
Important:
(a) At the tender age of 10 weeks, a male chinchilla has the ability to get a female chinchilla pregnant.
(b) At the tender age of 3 1/2 to 4 months old a female chinchilla has the ability to get pregnant, but is not mature enough to be allowed to do so. (The birth canal is not large enough to safely deliver kits).
(c) Even within the same family, two male chinchillas in the same cage will sometimes fight to the death for the right to impregnate a female that is in season ... even if they are caged together in a separate cage away from the female and neither can get to her. This could happen any time the female goes into season ... it's called survival of the fittest. (You might want to look for an additional cage or two.
)
2) What size are the cages you now have? What is the distance between the wires both vertically and horizontally? Please, post a picture, if possible.
3) When a female is in season, she will be slightly swollen and more moist than usual and there will be what looks like a tiny dot of red blood in the crease. Female chinchillas also tend to clean themselves more often during this time. {As seen in the photos below.}
4) Yes, the females can become more "aggressive" if you would like to put it that way, I tend to think it is more "fed-up" with the constant pestering by the male. The male has the cutest little mating dance he will do ... it's called the "Swish-swish Tail Dance". He will do a little "hop-hop" then swish his tail from side to side, hop hop and swish-swish again. If you look closely, you may even see an eager look on his face or a sheepish grin. This sounds like the female should appreciate this romantic courting ritual ... but ... the male starts this l-o-n-g before the female is in full season and continues to do it almost constantly until she in full season and gives in to him.
His part takes about 15 to 30 seconds.
So even "supervised playtime outside the cage" has to be very closely supervised!
5) A bonded pair that is separated can cause problems ... chinchillas under stress or depressed can go down hill quickly ... they must both be watched carefully to make sure they each continue to eat and drink normal amounts of food and water. Weight and any change in poops must be closely watched.
6) Any time a pair of chins are placed in a breeding situation, there is always a chance of kits. A breeding situation is any time a male, 10 weeks or older, and a female 3 1/2 months or older are placed in the same area to play or cage to live in together.
7) Spaying or neutering is extremely dangerous for chinchillas ... chinchillas do not react well to any surgery. I will not allow one of mine to be operated on for any reason, unless it is a life threatening situation and there are no other choices available.
The 2 I already have are a standard gray (Xochitl) and either another (but darker) standard gray or a light black velvet (Sorley). They appear to be about a year old... Xochitl may have been attacked by the last owners dog. She had hair growing back on both hid quarters and the baby was not present in the cage and we weren't told what happened to it.
Confused here.
Are you saying they have already had a kit/litter?
If a dog gets a hold of a chinchilla, it rarely survives. I would ask what happened to her ... there may be an additional problem that may need to be addressed. Some chinchillas like some dogs, while not liking other dogs. Some dogs look at chins as playmates
(as does my oldest Great Dane check out:
http://www.luvnchins.com/AChinsPointOfView.html ), while other dogs look at chinchillas as pretty play toys
(as does my youngest Great Dane -that's why she is not allowed around them), while other dogs might look at them as an expensive gourmet treat.
Chinchillas usually sense which one it is.
Is Dagda the kit you are getting this weekend?
I figured I'd just keep working with her but then last night I was trying to get her from under the wheel and Sorley (having been in the wheel) leaned over and tried to sniff her when she started barking at me and she bit him in the nose!
Personally, I think he was just in the wrong place at the wrong time ... remember, you were trying to get her out from under the wheel ... she already felt threatened.
9) Do you think she is pregnant at this time?
Jo Ann
Added: Female in season and not in season.