How awful for you and your SIL I really feel for you all and those poorly dogs I do hope things go well and they both return to good health soon.
Poppy was off colour last week and we took her to see the vet who pronounced her fit and well and couldn't find any problems,suddenly we found the reason, when she came to us 5mths ago we did not know if she had been spayed or not and she came into season on Monday so she will be off to the vets in about 6 weeks for the operation,she has certainly improved as the week has gone on and looks as though she is becoming her old self again.