my dad already has plans for my goats to help keep down his brush and he even talks about using them in his landscaping business lol
Two caveats here:
* If chemicals are used on his customer's properties, you won't want the goat's milk or meat.
* How are you going to milk them daily if they're somewhere else?
Perhaps, a couple of Billy Goats for his use would be better. No milking to worry about, and they could provide you with both meat and
kids. A Win/Win situation for you, your father, AND the goats!
how tall a fence i need to keep them out of the garden during the growing season
As long as there is plenty to forage outside the garden, they should be
relatively happy. A 3-4 foot chicken wire fence will probably suffice. Put a stake in each corner, and nowhere else. They usually don't fly over a fence, but rather hop up on the edge, then hop down inside. If there are only stakes at the 4 corners, then the spans of chicken wire in between will be 'floppy'...chickens don't like that...they like to land on a firm, stable edge.
what is a nice all around good chicken breed as i want it to lay some and be a roaster at some point
Almost any breed labeled "dual purpose" will give you a steady supply of eggs, yet grow large enough for a 'final meal'.
Rhode Island, or New Hampshire reds, Plymouth are some of the most popular dual purpose breeds. Under decent conditions, any of these should give you 200+ eggs (each) per year, and put a 5-6 pound bird on the table come Sunday night.
do i need a heated coop for winter?
No. Their coop should be designed to keep the wind and rain off of them (yet still offer good ventilation). Once they get past their first season, they will molt each late/summer/early autumn (depending on your climate). This gives them a brand new winter coat. As the days grow colder, they acclimate to it. A big factor to consider with heating is that with heating, they will not harden themselves off. With a brown out lasting several days, they may die if they are reliant on heat. My grandmother raised chickens around Hudson's Bay (-40 degrees) in coops that were completely open on the south side (and no electricity there back then!).
do livestock gaurd dogs work well against hawks and other raptors
I wouldn't say "well", but they do help. Most predators try to avoid areas with activity (other than what they want). If it is a dog sleeping under the oak tree, they will pay him no mind. If he is actively patrolling the area, they will probably go look elsewhere.