Information and opinions on Allergy from Jim at MyAllergyNetwork.com. The HealthCentral Network, Inc. (www.HealthCentral.com) is one of the top health destinations on the Web, with more than 35 condition-specific, wellness and general health Web properties. http://www.healthcentral.com/allergy/c/78340 http://www.healthcentral.com/allergy/c/78340/rss self application/xml en-us 15 120 19 http://www.healthcentral.com/images/hc_logo_sm.gif http://www.healthcentral.com/allergy/c/78340 http://www.healthcentral.com/allergy/c/78340/19290/dog-allergy Thu, 17 Jan 2008 09:55:00 -0500 Jim We purchased a puppy for x-mas this year.  Our kids had asthma when they were small but have not had any episodes for at least 5 years.  My questions are:  If you have a dog and have some level of allergy symptoms can it make colds/virus' worse?  Do allergens build up and you have a reaction or should you see an allergic reaction within the first hour or week (i.e. my assumption is that if you are allergic to a dog... http://www.healthcentral.com/allergy/c/78340/19290/dog-allergy