



Planned Mastiff litter
Due Feb. 2026
I'm Haley, the breeder behind Cain Kennels Mastiffs located in North Port, FL. We raise our dogs and puppies In our home with a strict desensitization program. It is important to us that our puppies are happy, healthy, and provided the best care while they are with us so that when they go to their loving homes, they have the best start possible.
Why did you start breeding?
What makes your program special?
What are the different breed coat colors in your program?
Where do your breeding dogs live?
These dogs are already reserved or have gone home.
Jett
Male
Rosie
Female
Emerald
Female
Bluey
Male
Hunter
Male
Navy
Male
Angel
Female
Mistletoe
Female
Merry
Female
Dasher
Male
Samson
Male
Aurora
Female
Raven
Female
Saffron
Female
Ember
Female
Haley has been certified by Good Dog's screening team for responsible and trusted breeding practices. When you're ready to reach out, feel free to ask any questions about the breed, their program, or specific puppies.
Together, you’ll choose the puppy that’s right for you, stay in touch with regular updates, and plan how to bring your new puppy home.

"1st set of shots, dewormings, health certificate, health exam, microchip, akc prepaid registration, health guarantee, puppy care pack with leash, collar, blanket, puppy bags, licking mat and more! Deposits are nonrefundable due to the time it takes away from the puppy’s new home after having to be be removed and replaced, as well as for missing out on potential homes."
Haley may provide a written contract or health guarantee when you purchase a puppy. This helps protect both you and your breeder, ensuring that you both have a clear understanding of the terms of your puppy purchase. If Haley offers a contract or guarantee, the details will be personalized by them. If you have any questions or want to know more, don't hesitate to reach out to Haley directly.
You can drive or fly to pick up your puppy from Haley.
Meet in North Port, FL
870 miles away
·
Meet at Sarasota–Bradenton Airport
856 miles away
·
Flexible meeting point
Haley can meet at a location that works for both of you
Haley has been a member of Good Dog for over 1 year
Haley was screened for responsible practices and has been a member since 2024.

Cain Kennels Mastiffs meets or exceeds our community standards in these areas:

Haley
Athena completed a TCI today ! We will check in 30 days via ultrasound to confirm pregnancy!!

TBD and Athena's litter

Haley
Gorgeous babies are here!


Murphy and Hera's litter

Haley
Merry Christmas, from Rosie!! We just had a baby 12/14 so we apologize if any responses are delayed !

Haley
Athena on thanksgiving


Murphy and Athena's litter

Haley
Don’t forget to check out our website!


Murphy and Athena's litter

Haley
Puppies really need homes


Murphy and Athena's litter
Mastiff
About Athena
Athena is amazing and the sweetest mastiff you’ll ever meet. She is loving in nature, healthy, beautiful, Gentle, and also protective. She is everything a mastiff is supposed to be! Athena also has all her health testing done, with excellent hips. Normal heart, thyroid, elbows,and patellas. Athena also has DNA testing Which gave negative, non-carrier results for PRA, cataracts, HUU/HU, DM, and more!
Great health testing
Excellent level
Cain Kennels Mastiffs reports to performing the health tests below on their breeding dogs. Ask your breeder about the tests performed on the parents of your litter. Learn more about health testing for Mastiffs.
Hip Dysplasia
Hip testing reduces the chance of passing down hip dysplasia, which is primarily found in large breed dogs and can cause hip pain and the eventual loss of the function of the hip joint.
Elbow Dysplasia Finals (OFA, BVA, SV, FCI)
Elbow testing reduces the chance of passing down elbow dysplasia, which is primarily found in large breed dogs and can cause arthritis in the elbow joint and front leg lameness.
Eye Certification (CAER, registered with OFA)
Eye testing reduces the chance of passing down a wide range of hereditary eye illnesses including retinal dysplasia, lens luxation, and glaucoma, which can cause impared vision or blindness.
Cardiac Evaluation (registered with OFA)
Heart testing reduces the chance of passing down congenital heart disease, which can cause a range of symptoms ranging from trouble exercising to heart failure.
Thyroid (Autoimmune Thyroiditis, registered with OFA)
A breeder may perform additional tests on their dogs that do not fall into these general categories. These tests may be more uncommon or very specific to a particular breed.
Cystinuria Type 3, English Mastiff Type Risk Factor, Progressive Retinal Atrophy (PRA), Generalized, Early Onset Progressive Retinal Atrophy (EOPRA), Degenerative Myelopathy (DM; SOD1A), Hyperuricosuria (HUU), DNA Disease Panel
Genetic testing reduces the chance of passing down a wide variety of hereditary diseases of differing prevalence and severity such as Progressive Retinal Atrophy (an eye disease) and Von Willebrand's Disease (a blood disease).
Health testing is one key piece of responsible breeding and is performed on breeding dogs to prevent the presence of heritable conditions in their puppies.