Older Rescue

Question
Hi,
I have just (as in the past 96 hours) completed my adoption of an 8 year old shih tzu/yorkie mix. She has a cataract in one eye and is believed to have come from a puppy mill.
I do adore her.

She has been exceptionally well crate trained. However, being crate trained and being house trained are very different things. I live in an apartment, so I do not have access to a fenced in yard. I am considering litter box training her.
It is going to be difficult to traditionally house break her because she doesn't squat to use the restroom. She just keeps walking and let's it fall out of her body wherever she happens to be.  So its hard to catch her in the act and immediately take her outside.
I am following a regiment of getting up with her at 7am, taking her out, feeding her, taking her out before I leave for work around 7:45 usually. Then I get home around 4 and let her out again. Feed her at 7, let her out around 7:30-7:45 and then again around 11 before I go to bed. However, she seems to just go at will and doesn't seem interested in holding it in. I praise her when she goes outside, and have been scolding her for her accidents (I have since learned that this is incorrect).

Do you have any experience with litter box training? And if your are opposed to it, what would be the best way to handle my dog's quirky excretion ways so that I can effectively train her? I'm trying to nip a burgeoning problem in the bud.

Thanks in advance

Answer
Litter box training is a good idea,esp if you live in an apartment and have a small dog

It's really not that much different from outdoor training,just instead of placing her outside when she has an accident,place her in the box-and in fact is often easier as they have access to it even when you are not home,just praise her everytime she does something in the litter box