Marissa O.
Fowlerville, MI






Services
Marissa can care for
Availability
Full-time pet sitter with flexibility. Calendar is updated regularly. Please ensure that there is plenty of time to schedule a Meet & Greet prior to booking!
| S | M | T | W | T | F | S |
|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | |
7 | 8 | 9 | 10 | 11 | 12 | 13 |
14 | 15 | 16 | 17 | 18 | 19 | 20 |
21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 | 29 | 30 |
About Marissa O.
Communication
Dog skills
Cat skills
Safety, trust & environment
Pets are supervised at all times while outdoors, even in a fenced-in and/or secured environment. No other animals are brought into a client’s home unless otherwise requested.
Information Marissa O. would like to know about your pet
I am grateful when clients keep me informed about any changes to the pet's health or behavior during each booking. It can be very helpful in fulfilling each pets’ personal needs. -M
A typical day
Marissa likes to stay active, so she enjoys walks and playing with pets. She also enjoys reading, which can be a surprisingly fun enrichment activity for some pets. On a hot summer day, she might take her dog to the lake to cool off and sunbathe.
Location
Fowlerville, MI
Pets
Marissa O. has Star Sitter status
The Star Sitter program highlights responsive sitters who deliver highly rated care and have a history of listing accurate availability and preferences, making it easier for pet parents to find the best care for their pets.
A paws-itive pet experience
Pet care experience
Marissa Ostrowski has spent practically her entire life caring for animals of all shapes, sizes, ages, and personalities. Today, she lives in Fowlerville, MI, with pets of various species! Shortly after graduating high school in 2020, Mercy worked at a doggie daycare/boarding facility, where she gained plenty of valuable knowledge and experience (including Pet CPR and First Aid and keeping a pet safe in any emergency). Some days, she was responsible for the safety and security of up to 25 dogs at a time. From 2024-2025, Marissa went on to work at a veterinary clinic as a dynamic Kennel Technician. Not only did she gain extensive and valuable pet care knowledge, but she was also assigned to a myriad of tasks around the clinic; primarily, keeping patients safe and comfortable during recovery. Mercy is currently enrolled in Animal Behavior College’s Dog Obedience Instructor program, and works hard to reach her goal of becoming a service animal trainer. She hopes one day to have the opportunity to change many lives for the better, pets and people alike.
Cat care experience

Marissa also cares for cats. Learn about their cat-specific care experience.
Reviews


Marissa did a great job with my two dogs. This was my first time using a house sitter, so I was a little nervous but Marissa was professional and great! She sent updates and pictures and my dogs were very happy. When I returned the house was nice and tidy just as I left it. Most importantly, Molly and Baxter loved Marissa and were happy and relaxed when I returned. I would definitely recommend Marissa and will be using her for future dog walks and travel.

Wow! Marissa was awesome! Our puppy is shy and skittish, but she was able to gain his trust quickly. She followed instructions, went above and beyond and was very trustworthy. Marissa is also awesome with communication.




Marissa has been wonderful! She has gone above and beyond to take care of my kitty cats. She is very detailed and professional, and I always look forward to her updates!


Thank you for doing a great job!
About Marissa O.
Communication
Dog skills
Cat skills
Safety, trust & environment
Pets are supervised at all times while outdoors, even in a fenced-in and/or secured environment. No other animals are brought into a client’s home unless otherwise requested.
Information Marissa O. would like to know about your pet
I am grateful when clients keep me informed about any changes to the pet's health or behavior during each booking. It can be very helpful in fulfilling each pets’ personal needs. -M
A typical day
Marissa likes to stay active, so she enjoys walks and playing with pets. She also enjoys reading, which can be a surprisingly fun enrichment activity for some pets. On a hot summer day, she might take her dog to the lake to cool off and sunbathe.
Marissa O.
Fowlerville, MI
