Normally a female (of any breed) will come into heat approximately every 6 months. It could be sooner if they are around another female in heat.
I have a female English mastiff that is a year old and just weighted in at the vet at 120lbs...don't know if that is normal, but thought I would try to help out.
I have a Mastador that's a year and a half and hes 100 pounds.
Usually two.
She will bleed from 4 to 7 days and it will happen at least twice a year.
I have an 11 year, 4 month old English Mastiff...trying to find out if there are any older English Mastiffs out there. I have an English Mastiff male that is will be 11 on July 26, 2009. How long ago was your post? Simon, my Old English Mastiff, will be 12 on January 4th, 2010 I have an Old English Mastiff named Trixie http://www.dogster.com/dogs/478574 who turns 13 on December 7, 2009 (in a week). But there is apparently a 15-year-old in Australia... My English Mastiff, Asia, was born February 10, 1997 so I guess that makes her 13 years and about 3 months. She's in good health-just moves slower these days. My OEM Karma turned 13 on Jan 27, 2010 (13 yrs 4 mos as of this posting). Decent health. Hind legs are weakening & she's lost quite a bit of muscle mass, slow on steps now & won't do steep ones. Has had/currently has numerous benign tumors; but a couple of nights a week she still gets the play bug & runs around the house & wants to play inside fetch w/her stuffed toys. She's mostly over playing fetch with bricks outside though - she gets tired after about 3 tosses.
Chewy
1/ They beat maimi heats in the year 2011. They beat the Heats 4-2. Maimi won the first two games then dallas won the rest
mike miller
2005
I had an English mastiff and it was only 1 year old when it died but it was about 145 pounds just at that age so it can range depending on the age and stuff like that so i don't know if that helped you out at all???????
no
should be around 100 pounds. Mine is a year old and weighs 105.