A list of potential substitutes, if you can
Sirdar 7367 Dog Accessories in Hayfield DK with Wool, and Sunggly Snowflake DK (downloadable PDF) - Wool Warehouse - Buy Yarn, Wool, Needles & Other Knitting Supplies Online!
Dog Cushion Substitute Yarns - Amanda Berry
Sirdar No 1 Accessories Knitting Pattern 8047
Sirdar, Twilleys, Super Chunky, Denim Ultra, Twilleys Freedom Wool
Sirdar 7325 Ponchos in Husky Super Chunky (downloadable PDF) - Wool Warehouse - Buy Yarn, Wool, Needles & Other Knitting Supplies Online!
More To The Point Wool
Knitting Pattern: Dog Sweater and Toy. Cute Baby and Toddler Clothes to Knit in DK Yarn for 0-2 Years. Sirdar Baby Knitting Pattern
Super Chunky Patterns
Ravelry: Sirdar Husky Super Chunky