Is Syntest made from horse urine, like Premarin?

Is estrogen made from a horse's urine

A friend told me that the estrogen that I take is made from horses urine.  She stated that these horses are made to stand in a stall so tight fit that they can't move, turn, kick up their leg even, barely turn their heads for 3 to 4 days until some pass out just to collect urine for estrogen.  She asked that I find an alternative hormonal to take rather than estrogen.  I told her I had tried OTC Estroven energy but my doctor says my RX is by my body's chemicals and results for my balancing, and I need balance.  She insisted that I not continue as I am supporting product made in result of animal cruelty.  Pass it on