Pet DRx CORP Watch

from SC 13G 3 pages Agreement of Joint Filing

from S-1/A ~50 pages The Undersigned, Echo Healthcare Acquisition Corp., a Delaware Corporation (“Company”), Hereby Confirms Its Agreement With Morgan Joseph & Co. Inc. (“Morgan Joseph & Co.”, Referred to Herein Variously as “You,” or the “Representative”) and With the Other Underwriters Named on Schedule I Hereto for Which Morgan Joseph & Co. Are Acting as Representative (The Representative and the Other Underwriters Being Collectively Called the “Underwriters” Or, Individually, an “Underwriter”) as Follows: 1. Purchase and Sale of Securities. 1.1 Firm Securities

from S-1/A ~50 pages Form of Underwriting Agreement Between Echo Healthcare Acquisition Corp. and Morgan Joseph & Co., Inc. Dated: , 2006

from S-1/A ~5 pages Form of Selected Dealers Agreement

from S-1/A ~50 pages The Undersigned, Echo Healthcare Acquisition Corp., a Delaware Corporation (“Company”), Hereby Confirms Its Agreement With Morgan Joseph & Co. Inc. (“Morgan Joseph & Co.”, Referred to Herein Variously as “You,” or the “Representative”) and With the Other Underwriters Named on Schedule I Hereto for Which Morgan Joseph & Co. Are Acting as Representative (The Representative and the Other Underwriters Being Collectively Called the “Underwriters” Or, Individually, an “Underwriter”) as Follows: 1. Purchase and Sale of Securities. 1.1 Firm Securities

from S-1/A ~50 pages 9,375,000 Units Echo Healthcare Acquisition Corp. Underwriting Agreement

from S-1/A ~50 pages 9,375,000 Units Echo Healthcare Acquisition Corp. Underwriting Agreement

from S-1/A ~5 pages Echo Healthcare Acquisition Corp. Units Consisting of One Share of Common Stock and One Common Stock Purchase Warrant Selected Dealer Agreement