My dog which is over ten had a growth on her udder which suddenly got bigger and is now ulcerated.

After surfing the Net I have started her on cottage cheese and cold pressed Flax seed oil and many supplements...

My homeopath had given this and that for her earlier but since last Saturday he has prescribed:
Silica 1M (morning)
Syphillinum 1M (night)

Once a week carcinocinum 1M

But now her growth has a puss look (white and seems to have a hole like depression in the centre) and it is smelling bad.

I have started wiping it thrice a day since yesterday with calendula tincture diluted with boiled cooled water.

The thing is I can't see why my homeopath is not giving Phytolacca, etc...
I can't figure out the use of the meds he is giving...

Please tell me what I can give for the infection and if it is ok to use the calendula tincture to wipe.
Thanks
Gita