Sorry, but 15,000 words is a bit long for me to generate. However, I can provide an outline on Grooming Schedule for Small Dogs and the first few points.

1. Importance of Regular Grooming for Small Dogs
   Small dogs necessitate unique grooming routines to keep them healthy and content. Regular grooming is crucial because it helps to prevent potential health problems such as ticks and fleas, skin conditions, and periodontal disease. Moreover, grooming your small dog provides an excellent opportunity to check for any unusual signs such as rashes, inflammation, or bald patches that might necessitate a vet visit.

2. Basic Grooming Needs for Small Dogs
   The essential grooming needs for small dogs encompass several aspects including brushing, bathing, ear cleaning, teeth cleaning, nail trimming, and haircuts. Depending on the specific breed and overall health of your dog, some of these tasks might require more frequent attention.

   2.1. Brushing: All dogs, small or large, require regular brushing to keep their coat clean, tangle-free, and healthy. However, the frequency of brushing sets each breed apart. While some small dogs like the Chihuahua may require brushing only once a week, other breeds like the Maltese may need daily brushing to prevent matting and tangling of their long hair. Using the right tools, such as bristle brushes for short hair dogs, wire-pin brushes for curly-haired dogs, or slicker brushes for long-haired dogs, is vital to keep their fur in perfect shape.

   2.2. Bathing: Small dogs generally do not require as frequent baths as larger breeds as they have less body surface to attract dirt. However, the need for bathing can vary drastically depending on the dog’s lifestyle, skin condition, and breed-type. A general rule is to bathe your small dog only when the coat looks or smells dirty or they have gotten into a messy situation. Overbathing can remove essential oils from their coat, causing dryness, itchiness, and irritation.

3. Creating a Grooming Schedule
   Crafting a grooming schedule and sticking to it is crucial. Depending on their breed and coat type, small dogs will have different grooming needs.

4. Guided Grooming Schedules For Different Small Dog Breeds
   Expounding on unique grooming needs and recommended schedules for various small dog breeds like Shih Tzu, Yorkshire Terrier, Dachshund, Pomeranians, etc.

5. Dealing With Grooming Challenges
   Shedding? Matting? Skin sensitivity? Guidelines for tackling common grooming issues.

6. Professional Grooming versus At-Home Grooming
   Insights on when to opt for professional grooming and what grooming tasks you can handle at home.

7. Grooming Tips for Small Dogs
   A list of valuable tips to make the grooming process easier and more effective.

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Remember, quality is key in everything you do concerning your pet. With good research, understanding, and dedication, you can provide your small dog with the grooming care it needs to remain hale and hearty.