Pond Mills Cemetery is one that I photographed several years ago for the Canada GenWeb Cemetery Project. Photographs of all the McDougall headstones can be found here:http://cemetery.canadagenweb.org/ON/ONP12706/index4.html
Just based on the time frame you suggest (b. 1794), these may not be your McDougalls. The inscription for Alice and Alice reads:
Alice, wife of Angus McDougall died Nov 13, 1853
Their daughter Alice died March 11, 1855
There is an Angus McDougall here which, based on the dates and the style of the stone, could either go with Alice or with another woman, Margaret McDougall, who was married to an Angus McDougall. This stone reads:
In memory of Angus McDougall died Oct. 27, 1895 ae 70 Ys
The other McDougall children on other stones all appear to come from the union between Angus and Margaret, and the birth year for one of the children overlaps with Alice's life. Two scenarios:
1. Alice and Alice are the wife and daughter of Angus McDougall Sr. (whose stone is either not present or not legible) and the other Angus is their son (or not related at all) or
2. There is only one Angus McDougall here. Margaret could be a second wife to Angus, married after Alice died, if the daughter Isabella was born to Alice but raised by Margaret (and considered Margaret to be her mother).
I'm sorry to make this confusing... if you like, I can go back and see exactly which woman appears on the stone with Angus (or if both of them do). Good luck sorting these McDougalls out!