What's really in the 'house special' fried rice?
At the takeout where I worked, it was chicken, pork, shrimp, and vegetables. You could get each of those separately, or beef fried rice, or scallops if you wanted to pay more. We also had 'house special' lo mein, egg foo young, chow mein, chop suey, and chow mei fun. And it was possible to get sweet & sour pork, chicken, and shrimp together, but we called that a "combo" instead. (Which was not to be confused with our "combination platters"...). Then there was Hunan Triple Delight, which was chicken, beef, and shrimp. And Four Seasons, which was all four of the main meats. There were other meat combination things too that involved various forms of seafood.
To answer the unspoken insinuation in the question that you may or may not have intended: no, we did not serve cat meat. Chinese restaurants don't serve cat meat, they're subjected to the same health dept regulations as every other restaurant - which includes checks of whether food suppliers are approved or not. Chinese restaurant owners are either confused by the concept or insulted, depending on how often they've heard it. Either way it isn't very funny from the kitchen side of the counter.