Poor girl. You can check out the rat guide as @ratbusters stated. Only you can make the decision on when it’s time, and Stella will let you know when she’s ready. To answer your question, there are a few things you can go by.My girl Stella has a mammary tumor that is as big around as she is, and about 1/3 the size of her. I fist noticed it in July. It seems to be growing rapidly now; a month ago it was 1/4 the current size.
She is less active during free roam, sleeps a lot, and has started to waddle when she walks. She is 2 1/2 years old though. There's a vein that is stretched worryingly across the mass of the tumor, but it hasn't been a problem so far. I also just found a new pea sized lump on the same side near her urethra.
Stella tries to act normal, but gets confused when she can't fit into small things anymore, silly girl. I have adapted her cage to assist with mobility, and have food and water on both levels.
How do I know when it's time to have her put to sleep? Do I go by size, or quality of life? I hate that I will have to make this decision.
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-Size
-When it affects her mobility
-If it splits open
-If it gets sores on it
-If her quality of life just isn’t good
This artcicle by a licensed breeder can help. Scroll down to where it’s about tumors. I wish you guys the best of luck! 💛